On Tue, Jan 5, 2021 at 3:23 PM Niels Möller <ni...@lysator.liu.se> wrote:
> I've made a new branch "arm64" with the configure changes. If you think > that looks ok, can you add your new ghash code on top of that? > Great. I'll add the ghash code to the branch once I finish the big-endian support. > (It would be good to also > get S390x into the ci system, before adding s390x-specific assembly. I > hope that should be easy to do with the same cross setup as for arm, > arm64, mips, etc). > This is not possible since qemu doesn't support cipher functions, it implements subcode 0 (query) without actual encipher/decipher operations, take a look here https://git.qemu.org/?p=qemu.git;a=commit;h=be2b567018d987591647935a7c9648e9c45e05e8 I had a talk with David Edelsohn for this issue, I concluded that there is no support for cipher functions on qemu and it's unlikely to happen anytime soon. However, I updated the testutils to cover the s390x-specific assembly so the patch can easily be tested manually by executing 'make check'. I also have tested every aspect of this patch to make sure everything will go well once it's merged. > I wonder which assembly files we should use if target host is aarch64, > > but ABI=32? I guess the arm/v6/ code can be used unconditionally. Can > > we also use arm/neon/ code unconditionally? > > The reference manual says > > Armv8 can support the following levels of support for Advanced SIMD and > floating-point instructions: > > * Full SIMD and floating-point support without exception trapping. > > * Full SIMD and floating-point support with exception trapping. > > * No floating-point or SIMD support. This option is licensed only for > implementations targeting specialized markets. > > As far as I understand, that means Neon should be always available, in > both 32-bit and 64-bit mode. > I'll investigate how we can build the existing NEON implementations on 64-bit systems. regards, Mamone _______________________________________________ nettle-bugs mailing list nettle-bugs@lists.lysator.liu.se http://lists.lysator.liu.se/mailman/listinfo/nettle-bugs
